Cycles: Store time in BVH nodes

This way we can stop traversing BVH node early on.

Gives about 2-2.5x times render time improvement with 3 BVH steps.
Hopefully this gives no measurable performance loss for scenes with
single BVH step.

Traversal is currently only implemented for QBVH, meaning old CPUs
and GPU do not benefit from this change.

1 files changed, 4 insertions, 0 deletions

diff --git a/intern/cycles/bvh/bvh.h b/intern/cycles/bvh/bvh.h
index f8fb3b568ca..35f4d305883 100644
--- a/intern/cycles/bvh/bvh.h
+++ b/intern/cycles/bvh/bvh.h
@@ -175,6 +175,8 @@ protected:
 	                       const BoundBox *bounds,
 	                       const int *child,
 	                       const uint visibility,
+	                       const float time_from,
+	                       const float time_to,
 	                       const int num);
 
 	void pack_unaligned_inner(const BVHStackEntry& e,
@@ -185,6 +187,8 @@ protected:
 	                         const BoundBox *bounds,
 	                         const int *child,
 	                         const uint visibility,
+	                         const float time_from,
+	                         const float time_to,
 	                         const int num);
 
 	/* refit */